export default function formatDate(date: Date, fmt: string = "yyyy-MM-dd hh:mm:ss"): string {
    const o = {
        "M+": date.getMonth() + 1, //month
        "d+": date.getDate(),    //day
        "h+": date.getHours(),   //hour
        "m+": date.getMinutes(), //minute
        "s+": date.getSeconds(), //second
        "q+": Math.floor((date.getMonth() + 3) / 3),  //quarter
        "S": date.getMilliseconds() //millisecond
    }
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1,
        (date.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o) if (new RegExp("(" + k + ")").test(fmt))
        fmt = fmt.replace(RegExp.$1,
            RegExp.$1.length == 1 ? o[k] :
                ("00" + o[k]).substr(("" + o[k]).length));
    return fmt;
}
